Various factors including health care, hygiene, diet & nutrition, exercises, genetics determine the individual's longevity. In human it is around 120 years Certain mammals and reptiles live up to 200 years and in plant kingdom there are trees live...

Human body is an incredible machine created by God.The organizational set up of our body is amazing. Functioning of circulatory system, nervous system, digestive system, communication system, immune and healing systems...